电渣重熔过程中电磁与流动及温度场的数值模拟

Numerical Simulation of Electromagnetic, Flow and Temperature Fields in Electroslag Remelting Process

以电渣重熔体系电极、渣池和钢锭为研究对象,利用有限元分析软件求得稳定电渣重熔过程中电磁场和焦耳热场分布,并通过计算流体力学软件模拟耦合电磁场和焦耳热场的三维电渣重熔过程.分析了基本控制参数下电渣重熔过程金属熔池的形状、温度和速度场分布.结果表明,计算值与实验值总体吻合良好,尤其在渣–金界面以下部分,最大误差不超过10%;当电极插入深度为0.015 m时,渣池两侧的逆时针方向旋转涡流之间出现一个中间区域,中间区域的速度场为顺时针方向旋转涡流;电极插入深度每增加0.015 m,温度场最大值下降约为最大温度值的1%.

The magnetic and Joule-heat fields of electroslag remelting process （electrode, slag and ingot） were obtained by finite element software, and the electroslag remelting process coupled with the magnetic and Joule-heat fields was simulated by CFD software. Based on the basic control parameters, the metal pool shape, temperature distribution and velocity field were analyzed. The simulated results are in good agreement with the experimental data, especially on slag-metal interface, the maximum error does not exceed 10%. When the inserting depth is 0.015 m, an intermediate region appears between the anti-clockwise circulating eddies in the bulk of slag, which is controlled by a clockwise circulating eddy. The maximum temperature will be decreased by about 1% for each additional 0.015 m of the inserting depth.